Note 3 - Share-based Compensation

6 Months Ended

Jun. 30, 2016

Notes to Financial Statements

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

3. Share-based Compensation

The following table summarizes the components of our share-based compensation program expense (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Restricted share units:
Pretax compensation expense	$	8,939	$	8,053	$	16,907	$	15,704
Tax benefit		3,397		3,068		6,425		5,983
Restricted share unit expense, net of tax	$	5,542	$	4,985	$	10,482	$	9,721
Performance share units:
Pretax compensation expense	$	3,004	$	2,515	$	6,008	$	4,993
Tax benefit		1,142		958		2,283		1,902
Performance share unit expense, net of tax	$	1,862	$	1,557	$	3,725	$	3,091

As of June 30, 2016, we had $49.2 million and $13.4 million of total unrecognized compensation expense related to restricted share units and performance share units, respectively, that is to be recognized over the remaining weighted-average period of approximately 3.8 years for restricted share units and 2.6 years for performance share units. During the six months ended June 30, 2016, we issued 34,100 shares for vested restricted share units and 2,000 shares as a result of stock option exercises. Of these totals, 15,177 shares for vested restricted share units were issued during the second quarter 2016.